Estudo anatômico da madeira de Machaonia spinosa Cham & Schlecht (Rubiaceae)

The general and microscopic wood features of Machaonia spinosa Cham. & Schlecht. are described. The anatomical structure shows a strong similarity with literature references to the genus Machaonia and familia Rubiaceae. Among the most important characters observed in the wood, it must be emphasized the presence of a semi-ring porosity, pores mostly in multiples, exclusively simple perforation plates in vessels, very small and vestured intervascular pits, a scarce and paratracheal axial parenchyma, heterogeneous rays with short uniseriate margins, and inconspicuous bordered pits in the septate wood fibres.